Author: Daniel Clausen
Date: 08:17:51 10/30/03
Go up one level in this thread
On October 30, 2003 at 11:02:31, Uri Blass wrote: >On October 30, 2003 at 08:49:19, Uri Blass wrote: > >>On October 30, 2003 at 08:41:50, Tord Romstad wrote: >> >>>In order to find out how good my move ordering is, I determined to check >>>which percentage of the cutoffs occured on the first move searched. After >>>10 blitz games, the average was 91.4%. Looks a bit low, doesn't it? What >>>do other engines get? >>> >>>Tord >> >>I never checked mine but I think that it is not a good comparison. >> >>Things that are not connected with order of moves like null move pruning or >>extensions may change the %. >> >>Uri > >I can add that my opinion is that the only good comparison is time to solution >between the engine and itself. > >I remember from previous discussion that null move pruning reduce the quality of >order of moves by the definition that was given and it is misleading. > >It is logical that null move pruning is going to reduce the % of first fail high >because it means that the program does not have things like: > >1.e4 e5 2.Nf3 Qh4 3.Nxh4 a6 fail high for white in first move. >1.e4 e5 2.Nf3 Qh4 3.Nxh4 a5 fail high for white in the first move. >... There is a lot between "it's absolutely useless!" and "it's the perfect measure!"... I guess the percentage is a very good indicator to check quickly whether you're in the right alley or not. Having only 50% is probably bad, with null-moves or without... Sargon
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